PRODUCTION OF ANTIBACTERIAL AGENT FROM FUNGI ISOLATED FROM PHARMACEUTICAL SOIL SAMPLE BY FERMENTATION UNDER OPTIMIZED CONDITIONS

Objective: This study aimed to isolate fungi having antibacterial activity from pharmaceutical site soil sample and production of antibacterial agents by solid and submerged state fermentation under optimized conditions. Antibacterial activity of laboratory isolated and produced antibacterial agent was compared with other commercialized antibiotics to check the efficiency of laboratory produced antibacterial agent. Methods: For isolation and characterization of fungal isolates American Public Health Association standard was followed. Antibacterial activity was determined using disc diffusion and agar disc diffusion method. Results: On the basis of morphological and microscopic characteristics six fungal isolates belongs to four different genus species, i.e., Aspergillus sp. (F1, F2, F3), Penicillium sp. (F4), Rhizopus sp. (F5), and Fusarium sp. (F6), and they were tested against six bacterial isolates, i.e., Streptococcus sp. (B1), Bacillus sp. (B2), Staphylococcus sp. (B3), Bacillus sp. (B4), Bacillus sp. (B5), and Enterococcus sp. (B6). Except B4 all bacterial isolates growth were inhibited by fungal isolates. Under optimized conditions maximum zone of inhibition, i.e., 78 mm against B1 and B5 shown by F1 and F6 at 2% and 1% glucose concentration, respectively, at 10 pH. When comparison was made between commercialized antibiotics and lab produced antibacterial agents, it was observed lab produced antibacterial agent was more efficient in terms of zone of inhibition. Conclusion: Lab isolated and produced antibacterial agents were more efficient than commercialized antibiotics. This study demonstrated that lab isolated antibacterial agents isolated from six fungal isolates seems to be a stable and potent antibacterial and can be used as alternative to expensive commercialized antibiotics.Â

ANTIBIOTIC RESISTANCE PROFILING OF DAIRY WASTEWATER DEGRADING NATIVE EFFICIENT MICROBIAL ISOLATES

Objective: The objective of this study is to make sure biotreatment process used for treatment of dairy wastewater (DWW) is safe for human and its surrounding environment; microbes were evaluated for their antibiotic resistance profile against commonly prescribed antibiotics. Methods: Microbes were isolated using spread plating and streaking method and used to treat DWW. Reduction in organic load in DWW was determined by comparing physicochemical parameters (PCP) of DWW before and after treatment process. After selection of efficient microbial isolates, they were evaluated for their antibiotic resistance profile using antibiotic disc diffusion method. Results: In this work, 53 microbes were isolated from DWW, and these microbial isolates were screened for DWW degradation capacity by analyzing PCP. Four microbial isolates E3, E5, E11 (bacterial isolates) and F5 (fungal isolate) showed highest reduction in chemical oxygen demand (COD), biological oxygen demand (BOD), and dissolved oxygen (DO) were selected for profound degradation of DWW under optimized conditions. Efficient four microbial isolates individually performed better under anaerobic conditions by showing maximum reduction 84%, 75%, and 77% in COD, BOD, and DO, respectively. After 72 hrs of antibiotic susceptibility testing, E3 strain had shown 100%, E5 90%, E11 70%, and F5 80% susceptibility to antibiotics. Conclusion: The present study concluded that four microbial isolates had the potential of reducing the organic load of DWW along with lessor or negligible adverse effect on human or its surrounding environment and they appear to be most promising strains for treatment of DWW.Â